computer says im connected but then freezes

ok i have windows xp sp2. tried out linux distro of slitaz and now i cant get online with windows but i can with slitaz.have tried ipconfig,power cycle router and modem,differant wireless adaptor.sometimes it says im connected but wont let me on.or it starts for my home page then freezes.before it freezes it shows packets sending and reciving and then stops.or it just shows the connection and tell me im not connected with a red x.what is going on. please someone help!